This is how someone with hemianopsia sees the world. The sight is not due to eye damage. It's due to a brain injury that literally blanks out one half of everything they look at. The complicating factor is that sometimes, the patients don't even realize that they can't see. »3/03/15 1:20pm Today 1:20pm

The recent measles outbreak has everyone taking another look at "childhood" diseases. Why are these diseases, relatively mild in children over five, so often devastating to adults? An infectious disease expert talks to io9 about possible explanations for why these viruses hit us hard when we should be at our… »3/03/15 12:00pm Today 12:00pm

The FDA just issued a warning not to use the weight-loss supplement Oxy ELITE Pro Super Thermogenic — because it contains fluoxetine, also known as Prozac. Not a drug humans should be taking unaware, and one that can cause serious side effects, including suicidal thoughts and seizures. »2/28/15 5:53pm Saturday 5:53pm

Andreas Vesalius was disappointed with his medical education. He figured out new ways to educate himself — ways that often involved a shovel, a set of duplicate keys to a graveyard, and his own students. »2/27/15 6:40am Friday 6:40am

A recently approved vaccine called Gardasil 9 protects against more strains of HPV and HPV-related cancers than any vaccine currently available. But who should get it? And how did it get so much better? Here's a complete rundown on the state of the art in HPV-cancer prevention. »2/26/15 11:58am Thursday 11:58am

Victims of exposure and hypothermia never have a good time of it, but sometimes they engage in a behavior that's both understandable and horrifying. It's called "terminal burrowing behavior," and involves losing their minds, running away, and crawling into a hole to die.»2/26/15 9:00am Thursday 9:00am

In what the delivery doctors at Cedars-Sinai Medical Center in Los Angeles described as "a moment of awe," a baby born at 26 weeks via cesarean section entered into the world while still completely wrapped in the amniotic sac. Warning: (fairly tame) medical images to follow. »2/26/15 6:20am Thursday 6:20am

During a debate over abortion legislation Monday between Idaho lawmakers, Republican state representative Vito Barbieri asked whether it would be possible for a woman to swallow a small camera, so that doctors might perform a remote gynecological examination (presumably, à la capsule endoscopy). »2/23/15 4:40pm 2/23/15 4:40pm

By using the same syringe to give injections to multiple people, health practitioners around the world are significantly driving the spread of many deadly infectious diseases. In an effort to deal with this problem, the WHO is pushing for syringes that cannot be used more than once — and they want this worldwide… »2/23/15 2:20pm 2/23/15 2:20pm

Materials scientists studying beavers have discovered why the crafty rodents never get cavities: the enamel in their teeth is rich in iron. Iron, they found, resists acid more effectively than fluoride. »2/23/15 10:20am 2/23/15 10:20am

In Southeast Asia, the malaria parasite has been steadily building resistance to the drug that's used to treat it. This scary news, but even worse: the resistance is on the verge of spreading into densely populated India. »2/22/15 4:00pm 2/22/15 4:00pm

Did an asteroid hasten the spread of black death in Europe? Dendrochronologist and author Mike Baillie says that tree rings "reveal a major event just before 1350. Something catastrophic," similar to the Tunguska event, changed "the composition of the atmosphere and provided ideal conditions for a lethal infection to…»2/21/15 4:00pm 2/21/15 4:00pm

Serge Voronoff sold the early 20th century version of male enhancement – monkey testicles. No, we don't mean the monkey testicles were ground up and put in food, or even swallowed whole. We mean Voronoff stapled them to a person's body.»2/20/15 10:35am 2/20/15 10:35am

Everybody knows the human immune system will respond enthusiastically to exercise and healthy eating. But is there a way to get those benefits, which include enhancing our bodies' abilities to suppress certain kinds of inflammation, without, y'know, sweating or starving? »2/19/15 7:40pm 2/19/15 7:40pm

There have never been more options for those convinced that the medical establishment is hiding secrets from them. Look at the Google ads running down the sidebar of just about any website you visit, and you're almost certain to see ads about "natural" cures—gluten-free diets and alkaline water, superfoods and… »2/19/15 2:11pm 2/19/15 2:11pm

Almost everything we consider common knowledge today was once a total mystery. Around the second century AD, no one in the western world knew that the arteries, veins, and heart were filled with blood. Most thought they were filled with air. Here's how one man disproved that theory. »2/17/15 11:50am 2/17/15 11:50am